<?php
namespace lemon\widgets;

use Yii;
use yii\helpers\ArrayHelper;
use yii\helpers\Url;
use yii\helpers\Html;
/**
 * Class Menu
 * Theme menu widget.
 */
class Menu extends \yii\widgets\Menu
{
	public $linkTemplate = '<a id="sys_{name}" href="{url}" class="nav-link">{icon}{label}</a>';
	public $submenuTemplate = "\n<ul class='nav nav-treeview'{show}>\n{items}\n</ul>\n";
	public $activateParents = true;
	public $defaulticon= 'circle-o';
	public $options = ['class' => 'sidebar-menu', 'data-widget' => 'tree'];
	public static $iconClassPrefix = 'fa fa-';

	private $noDefaultAction;
	private $noDefaultRoute;
	private $icons = ['text-orange', 'text-teal', 'text-info', 'text-warning', 'text-danger', 'text-primary', 'text-success', 'text-purple'];
	private $i=0;

	public function run(){
		if ($this->route === null && Yii::$app->controller !== null) {
			$this->route = Yii::$app->controller->getRoute();
		}
		if ($this->params === null) {
			$this->params = Yii::$app->request->getQueryParams();
		}
		$posDefaultAction = strpos($this->route, Yii::$app->controller->defaultAction);
		if ($posDefaultAction) {
			$this->noDefaultAction = rtrim(substr($this->route, 0, $posDefaultAction), '/');
		} else {
			$this->noDefaultAction = false;
		}
		$posDefaultRoute = strpos($this->route, Yii::$app->controller->module->defaultRoute);
		if ($posDefaultRoute) {
			$this->noDefaultRoute = rtrim(substr($this->route, 0, $posDefaultRoute), '/');
		} else {
			$this->noDefaultRoute = false;
		}
		$items = $this->normalizeItems($this->items, $hasActiveChild);
		if (!empty($items)) {
			$options = $this->options;
			$tag = ArrayHelper::remove($options, 'tag', 'ul');

			echo Html::tag($tag, $this->renderItems($items), $options);
		}
	}

	/**
	 * @inheritdoc
	 */
	protected function renderItem($item){
		if (isset($item['items'])) {
			$labelTemplate = '<a href="{url}" class="nav-link">{icon}<p>{label}<i class="fa fa-angle-left right"></i></p></a>';
			$linkTemplate = '<a href="{url}" class="nav-link">{icon}<p>{label}<i class="fa fa-angle-left right"></i></p></a>';
		} else {
			$labelTemplate = $this->labelTemplate;
			$linkTemplate = $this->linkTemplate;
		}
		$active = '';
		if ($item['active']) {
			$active= 'active';
		}
		if(empty($item['icon'])){
			$icon = $this->defaulticon;// str_replace("@i@", $this->icons[$this->i%8], $this->defaultIconHtml);
			$text_color=' '.$this->icons[$this->i%8];
			$this->i++;
		}
		else{
			$icon = $item['icon'];// str_replace("@i@", $this->icons[$this->i%8], $this->defaultIconHtml);
			$text_color='';
		}
		
		$replacements = [
			'{label}' => strtr($this->labelTemplate, ['{label}' => $item['label'],]),
			'{icon}' => '<i class="nav-icon ' . static::$iconClassPrefix . $icon. $text_color.'"></i> ',
			'{url}' => isset($item['url']) ? Url::to($item['url']) : 'javascript:void(0);',
			'{name}' => $item['name'],
		];

		$template = ArrayHelper::getValue($item, 'template', isset($item['url']) ? $linkTemplate : $labelTemplate);

		return strtr($template, $replacements);
	}

	/**
	 * Recursively renders the menu items (without the container tag).
	 * @param array $items the menu items to be rendered recursively
	 * @return string the rendering result
	 */
	protected function renderItems($items){
		$n = count($items);
		$lines = [];
		foreach ($items as $i => $item) {
			$options = array_merge($this->itemOptions, ArrayHelper::getValue($item, 'options', []));
			$tag = ArrayHelper::remove($options, 'tag', 'li');
			$class = [];
			$class[] = 'nav-item';
			if ($i === 0 && $this->firstItemCssClass !== null) {
				$class[] = $this->firstItemCssClass;
			}
			if ($i === $n - 1 && $this->lastItemCssClass !== null) {
				$class[] = $this->lastItemCssClass;
			}
			if (empty($options['class'])) {
				$options['class'] = implode(' ', $class);
			} else {
				$options['class'] .= ' ' . implode(' ', $class);
			}
			$menu = $this->renderItem($item);
			if (!empty($item['items'])) {
				$menu .= strtr($this->submenuTemplate, [
					'{show}' => $item['active'] ? "style='display: block'" : '',
					'{items}' => $this->renderItems($item['items']),
				]);
				if (isset($options['class'])) {
					$options['class'] .= ' has-treeview';
				} else {
					$options['class'] = 'has-treeview';
				}
			}
			$lines[] = Html::tag($tag, $menu, $options);
		}
		return implode("\n", $lines);
	}

	/**
	 * @inheritdoc
	 */
	protected function normalizeItems($items, &$active){
		foreach ($items as $i => $item) {
			if (isset($item['visible']) && !$item['visible']) {
				unset($items[$i]);
				continue;
			}
			if (!isset($item['label'])) {
				$item['label'] = '';
			}
			$encodeLabel = isset($item['encode']) ? $item['encode'] : $this->encodeLabels;
			$items[$i]['label'] = $encodeLabel ? Html::encode($item['label']) : $item['label'];
			$items[$i]['icon'] = isset($item['icon']) ? $item['icon'] : '';
			$hasActiveChild = false;
			if (isset($item['items'])) {
				$items[$i]['items'] = $this->normalizeItems($item['items'], $hasActiveChild);
				if (empty($items[$i]['items']) && $this->hideEmptyItems) {
					unset($items[$i]['items']);
					if (!isset($item['url'])) {
						unset($items[$i]);
						continue;
					}
				}
			}
			if (!isset($item['active'])) {
				if ($this->activateParents && $hasActiveChild || $this->activateItems && $this->isItemActive($item)) {
					$active = $items[$i]['active'] = true;
				} else {
					$items[$i]['active'] = false;
				}
			} elseif ($item['active']) {
				$active = true;
			}
		}
		return array_values($items);
	}

	/**
	 * Checks whether a menu item is active.
	 * This is done by checking if [[route]] and [[params]] match that specified in the `url` option of the menu item.
	 * When the `url` option of a menu item is specified in terms of an array, its first element is treated
	 * as the route for the item and the rest of the elements are the associated parameters.
	 * Only when its route and parameters match [[route]] and [[params]], respectively, will a menu item
	 * be considered active.
	 * @param array $item the menu item to be checked
	 * @return boolean whether the menu item is active
	 */
	protected function isItemActive($item){
		if (isset($item['url']) && is_array($item['url']) && isset($item['url'][0])) {
			$route = $item['url'][0];
			if (isset($route[0]) && $route[0] !== '/' && Yii::$app->controller) {
				$route = ltrim(Yii::$app->controller->module->getUniqueId() . '/' . $route, '/');
			}
			$route = ltrim($route, '/');
			if ($route != $this->route && $route !== $this->noDefaultRoute && $route !== $this->noDefaultAction) {
				return false;
			}
			unset($item['url']['#']);
			if (count($item['url']) > 1) {
				foreach (array_splice($item['url'], 1) as $name => $value) {
					if ($value !== null && (!isset($this->params[$name]) || $this->params[$name] != $value)) {
						return false;
					}
				}
			}
			return true;
		}
		return false;
	}
}
